Home Appliance Energy Cost Guide: What Each Appliance Costs to Run

How to Calculate Appliance Energy Cost

Formula: Annual cost = (Watts ÷ 1,000) × Hours used/year × Electricity rate ($/kWh)

Average U.S. electricity rate: ~$0.16/kWh (varies from $0.10 in Louisiana to $0.30+ in Hawaii/California).

Annual Energy Costs by Appliance

Central AC (2-ton, SEER 14): ~$900–1,200/year (runs ~2,000 hrs/year in warm climates)
Electric water heater: ~$500–700/year
Refrigerator (modern, Energy Star): ~$50–80/year
Refrigerator (older, 1990s): ~$150–250/year — replacing old fridges saves $100+/year
Clothes dryer (electric): ~$75–150/year
Washing machine: ~$20–40/year
Dishwasher: ~$35–55/year
Electric oven/range: ~$50–100/year
50" LED TV: ~$15–25/year
Desktop computer (always on): ~$50–100/year

Highest-Impact Upgrades

The biggest energy consumers: HVAC system, water heater, and refrigerator. Upgrading to an Energy Star heat pump water heater from an electric resistance heater saves $300–500/year. A high-SEER AC replacement saves 20–40% on cooling costs. These upgrades have 3–7 year payback periods and are typically the highest-ROI energy investments.

Frequently Asked Questions

What uses the most electricity in a home?

In order: (1) HVAC (heating and cooling) — typically 40–50% of total electricity; (2) Water heating — 15–18%; (3) Major appliances (washer/dryer, refrigerator, dishwasher) — 15%; (4) Lighting — 5–10% (dramatically reduced with LED). Focus efficiency improvements on HVAC first for maximum impact.

Does leaving electronics on standby waste significant electricity?

Standby 'vampire' power costs average households $100–200/year total. Each device uses 0.5–10 watts on standby. Smart power strips eliminate standby waste for entertainment systems and computer setups. The savings are real but secondary to HVAC and water heating efficiency.